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Restricted Stock Units (Tables) (Restricted Stock Units [Member])
3 Months Ended
Mar. 31, 2015
Restricted Stock Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of restricted stock units granted, vested, forfeited and unvested outstanding
A summary of restricted stock units granted, vested, forfeited and unvested outstanding as of, and changes made during, the three months ended March 31, 2015, is presented below (shares in thousands):
 
Restricted Stock Units
 
Weighted Average
Grant Price
Unvested restricted stock units outstanding, December 31, 2014

 
$

Granted
2,769

 
1.04

Vested

 

Forfeited

 

Unvested restricted stock units outstanding, March 31, 2015
2,769

 
$
1.04

Schedule of share-based compensation, Restricted stock units, Allocation of recognized period costs
Stock-based compensation expense related to restricted stock units is allocated as follows for the three months ended March 31, 2015 and 2014 (in thousands):
 
Three Months Ended
 
March 31,
 
2015
 
2014
Cost of revenue
$
2

 
$

Research and development
2

 

Sales and marketing
1

 

General and administrative
65

 

 
$
70

 
$